Sash-balance.



No. 733,953. r I PATENTED JULY 21, 1908.

J. FOSTER.

SASH BALANCE.

APPLICATION FILED APR. 17, 1903.,

N0 MODEL.

Snoawtoz D Javifoster UNITED STATES Patented July 21, 1903;

FFIOE.

PATENT SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 733,953. dated July 21,1903.

Application filed April 17, 1903.

T0 at whom it may concern:

Be it known that 1, Moon Fosrnn, a citizen of the United States,residing in Altoona, in the county ofBlair and State of Pennsylvania,have invented certain new and useful Improvements in Sash-Balances, ofwhich the following is a specification.

My invention relates to improvements in sash-balances; and the object isto provide a mechanism of the kind named and for the purposes intendedwhich is simple in construction and arrangement of elements and which iscertain in operation and effective in holding the respective sashes inany position to which they may be moved and adjusted.

The invention embodiesa casing to receive the appliances, p pper andlower setsof sheaves or pulleys, chains on the sheaves, fasteningsconnecting the chains to the respective sashes at determined points, andmeans to rotate the sheaves and to lock the sashes at determined pointsin their movements, all as hereinafter will be fully described and thenovelty particularly pointed out and distinctly claimed.

1 have fully and clearly illustrated the improvements in the annexeddrawings, forming a part of this specification, and wherein Figure 1 isa View in elevation of a Windowframe, the side shields or strips beingremoved to show the arrangement of the sashohains, and the boxing orshaft-case being shown in longitudinal vertical section and showing theoperating-shaft and the means position to which they may be moved. Fig;

2 is a vertical section taken on the line 2 2 of Fig. 1. Fig. 3 isahorizontal section taken on the line 3 3 of Fig. 1. Fig. 4 is a detailend view of the operating-crank and showing the means for locking thearm or crank in the desired position. Fig. 5 is a detail perspectiveView of the operating-shaft and sprockets and the crank with thefastening or locking pin.

In the drawings similar parts appearing in the several illustrations aredesignated by similar reference-notations.

Referring to the drawings, A designates the window-frame, made up of theusual vertical stiles, a top rail, and a sill or plate at the bottom. Bdesignates the upper sash, and O the lower sash, of the usual make, and

Serial No. 15 3,112. (No model.)

guided in their movements by verticallyplaced guide cleats or strips 1,formed on the inner faces of the stiles of the frame and between whichthe side rails of the sash engage, substantially as indicated in thedraw ings. In the plate or sill 3, adjacent to the stiles, are madeopenings 4, through which the sash-chains pass during the operation ofraising and lowering the sashes. I

In each corner of the top rail and the stiles is secured a bracket 5,and in each bracket, between the depending plates thereof,is journaled asprocket 6, on which the sash-chains are arranged.

Below the plate 3 or sill is provided'a suitable boxing or case 7, theboxing being rectangular in formation or construction and extendingacross the width of the frame. A proper closure 8 closes the front sideof the casing 7, which closure may be removable for convenience. At oneend of the closure 7 is a box 9, into which the operating-shaft extends,as hereinafter stated more fully. The box 9 is provided with a door,(not shown,) through which access to theinterior may be had for thepurpose of operating the crank of the shaft. On the outer face of thepartition, between the casing 7 and the box 9, is secured a metal plate10, provided with a series of pin-holes 11, arranged in a circle atstated intervals apart, as shown in Fig. 4 of the drawings.

'Longitudinally of the casing 7 is journaled a shaft 12, whichhas oneend extended through the end piece of the casing, and on the projectingend is fixed a crank-arm 13,'in the-arm of which is made a pin-hole 14,through which a pin 15 passes, having an eye in its outer end, in whicha chain or other suitable holding device may be attached, as seen at 16.It will be readily seen that by inserting the pin through the arm withits inner end lodged in one of the pin-holes 11 the arm will be lockedin the position to which it may be turned,'and thus the shaft be lockedagainstrotation. On the shaft 12, at points in alinement-with thesprockets 6, are mounted fixedly sprockets 17 17. On the sprockets 6arr-(1 11 7 are arranged sprocket-chains 18.

At a determined point in the chains, being i such as will move thesashes the distance required in either direction, thechainsQare-fastened to the sashes, the connection being made to theupper sash by means of a staple 19, located, preferably, at a pointadjacent to the upper rail of the sash, and the connection to the lowersash being made to the other strand of the chain at a point in the lowersash adjacent to the lower rail of the sash, as at 20. It will bereadily perceived that this arrangement of the chains and theconnections to the sashes of the opposite strands will move the sashesin opposite directions, as may be desired, by turning theoperating-shaft in the direction to accomplish the movement of thesashes either up or down.

The chains and upper sprockets are concealed by angular or L-shaped sidestrips 21, as indicated in the drawings.

The utilization of the mechanism is apparent. The crank is turned toimpart rotation to the operating-shaft in the desired direction, whicheventuates in moving the sashes in the direction desired through theirconnections to the chains, and then when the sashes have been moved tothe location desired the holding-pin 15 is passed through the arm of thecrank into one of the pin-holes in the plate 10,

and the sashes are held and locked against further movement in eitherdirection for the time being and until the fastening-pin is detachedfrom its engagement. It will be perceived that I accomplish moving thesashes singly or in opposite directions by the connections of the linksor staples, as specified.

Having thus described my invention, what I claim is- The combinationwith the upper and lower sashes, of sprocket-Wheels journaled at theupper corners of the window-frame, a rotatable shaftjournaled under thebase of the windew-frame, sprocket-wheels mounted on the

